But in the worst-case scenario, the Deorbit Vehicle won’t be ready. Without it, a protocol agreed on in 2024, which relies on the Russian Progress spacecraft, could come into play. There will be vexing trade-offs to consider. Allowing the ISS to descend toward Earth on its own saves gas, which the ISS will need when it’s finally time to eject into the atmosphere and ensure a burial at sea. But a slow descent jeopardizes the machinery needed to maintain remote control.
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。同城约会对此有专业解读
Александр Курбатов (редактор отдела «Бывший СССР»)，更多细节参见爱思助手下载最新版本
（三）国务院财政、税务主管部门规定的其他情形。